Many scientists have agreed that the organic molecules needed for life could have formed due to simple chemistry on early earth. which organic molecule has been made to form in water in the laboratory?

a. proteins

b. dna

c. rna

d. amino acids

How do predators affect an ecosystem

Which of the following get their nutrients by growing on other plants, such as trees? A. epiphytes B. flowers C. hydroponics D. chlorophylls

The physical appearance physical appearance of trait is called the of trait is called the

Which organ of the human body passes nutrients from food to the blood? A gall bladder B stomach C small intestine D kidney

What direction do gray whales migrate in the fall

Nucleotide are composed of phosphate group, a sugar, and a nitrogenous base. DNA is made up of long strands of nucleotide. which part if the above molecule can differ between nucleotide? A. the sugar B. the phosphate group C. the nitrogen group D.

What organ system detects stimuli, secretes chemical and electrical signals, and controls all other organs

Which tissue type allows for organ movement within the body

Explain the role of enzymes and how they affect the chemical reactions of living things

Many arthropods young do not look like adults and do not eat the same food as adults. how would this be an advantage in an environment where food is scarce